Experimental study on weakly caking coal combustion preheated by circulating fluidized bed
文献类型：期刊论文
| 作者 | Zhu SJ(朱书骏)3,4; Zhu Jianguo2,4; Lyu Qinggang2,4; Man Chengbo4; Ouyang Ziqu2,4; Liu Jingzhang4; Ding Hongliang2,4; Liu Yuhua2,4; Zhang Xiaoyu1,4
|
| 刊名 | FUEL
 |
| 出版日期 | 2021-07-01 |
| 卷号 | 295页码:12 |
| 关键词 | Weakly caking coal Caking trend NO emissions Preheating Circulating fluidized bed |
| ISSN号 | 0016-2361 |
| DOI | 10.1016/j.fuel.2021.120592 |
| 通讯作者 | Zhu, Shujun(zhushujun@iet.cn) ; Zhu, Jianguo(zhujianguo@iet.cn) |
| 英文摘要 | In this study, we sought to achieve a stable high-efficiency and low-NOx combustion of weakly caking coal by preheating fuel in a pre-circulating fluidized bed (PCFB). When the operating temperature of the PCFB increased from 954 ?C to 1048 ?C and the fluidizing gas velocity increased from 2.02 m/s to 3.27 m/s, the stable operating time of the caking coal increased significantly from 290 min to 550 min. Moreover, the caking trend of the preheated char completely disappeared (RI = 0, GR.I = 0). The preheated char particles were obviously bonded together at 954 ?C, while the char particles were still clearly separated at 1048 ?C. These results indicate that the high preheating temperature and the high fluidizing gas velocity are beneficial to alleviate or even resolve the preheating instability of weakly caking coal. Based on the stable preheating operation, the temperature field and reaction field in the main combustion zone were relatively uniform. Gas-phase nitrogen-containing compounds in the post-combustion chamber existed mainly in the form of NO, and the NO concentration in the reducing zone was zero. With the gradual injection of the burnout air, the NO concentration first increased and then decreased to a stable level. By arranging the burnout air position separating the reducing zone and the oxidizing zone to broaden the reducing zone, NO emissions were further reduced without affecting the combustion effect. And the preheating combustion technology is verified to more flexibly arrange the number of air distribution layers in multilevel air distribution settings. |
| 分类号 | 一类 |
| 资助项目 | National Natural Science Foundation of China[52006233] ; China Postdoctoral Science Foundation[2020 M670479] ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences[XDA21040100] ; Postdoctoral Funding Project for the Construction of Highly Sophisticated Engineering Disciplines of University of Chinese Academy of Sciences |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000638041100008 |
| 资助机构 | National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; Transformational Technologies for Clean Energy and Demonstration, Strategic Priority Research Program of the Chinese Academy of Sciences ; Postdoctoral Funding Project for the Construction of Highly Sophisticated Engineering Disciplines of University of Chinese Academy of Sciences |
| 其他责任者 | Zhu, Shujun ; Zhu, Jianguo |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/86455]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Univ Sci & Technol China, Hefei 230026, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 3.Chinese Acad Sci, Inst Mech, State Key Lab High Temp Gas Dynam, Beijing 100190, Peoples R China; 4.Chinese Acad Sci, Inst Engn Thermophys, Beijing 100190, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhu SJ,Zhu Jianguo,Lyu Qinggang,et al. Experimental study on weakly caking coal combustion preheated by circulating fluidized bed[J]. FUEL,2021,295:12. |
| APA | 朱书骏.,Zhu Jianguo.,Lyu Qinggang.,Man Chengbo.,Ouyang Ziqu.,...&Zhang Xiaoyu.(2021).Experimental study on weakly caking coal combustion preheated by circulating fluidized bed.FUEL,295,12. |
| MLA | 朱书骏,et al."Experimental study on weakly caking coal combustion preheated by circulating fluidized bed".FUEL 295(2021):12. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。